# PocketCosmos — 3D Orbital Simulation Engine

> 3D Orbital Simulation Engine (iPhone/iPad app by 应龙 张.)

- Source: https://appshunter.io/ios/app/pocketcosmos/id6771312998 (this page in markdown: same URL + `.md`)
- Developer: [应龙 张](https://appshunter.io/developer/1514562080)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2026-05-21
- Data updated: 2026-07-18
- User reviews in markdown: https://appshunter.io/ios/app/pocketcosmos/id6771312998/reviews.md

## What is PocketCosmos?

PocketCosmos employs a real-time gravitational computation engine, accurately simulating celestial motion in a SceneKit 3D environment.

Technical Specifications:
- Gravity formula: F = G x M x m / r2, real-time N-body simulation
- Rendering: SceneKit + Metal, smooth 60fps performance
- Scenarios: 8 curated astronomical simulations
- Data source: Parameterized from NASA/JPL public datasets

8 Simulation Scenarios:
1. Solar System Panorama - all planets in proportional orbits
2. Inner Planets - close observation of Mercury through Mars
3. Outer Planets - Jupiter to Pluto orbital dynamics
4. Asteroid Belt - dozens of asteroid distribution simulation
5. Jupiter System - Galilean moon orbital mechanics
6. Pluto System - elliptical orbit and Charon tidal locking
7. Gravity Slingshot - probe acceleration effect demonstration
8. Solar System Top View - global perspective planetary alignment

Education Module (6 topics):
- Law of Universal Gravitation
- Kepler's Three Laws - elliptical orbits, area law, period law
- Tidal Locking - synchronous rotation mechanism
- Roche Limit - critical disintegration distance
- Supernova - stellar evolution final stage
- Lagrange Points - three-body gravitational equilibrium

Requirements: iOS 17.0+ | iPhone only
Privacy: Zero data collection, fully local execution


## Version history (last 1 release)

### 1.0.0 — 2026-05-21

No release notes.

## More apps by 应龙 张

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- [Pose Freeze Challenge](https://appshunter.io/ios/app/pose-freeze-challenge/id6768535242)
- [physchoice](https://appshunter.io/ios/app/physchoice/id6768562563)
- [MathDrill: Speed Practice](https://appshunter.io/ios/app/mathdrill-speed-practice/id6768584135)
- [Cube Master Studio](https://appshunter.io/ios/app/cube-master-studio/id6768941523)

All apps by 应龙 张: https://appshunter.io/developer/1514562080

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-18.*